<template>
  <div class="detail">
    <!-- 头部 -->
    <header>
      <div class="header-returns" v-show="isShow">
        <div @click="goBack">
          <i class="iconfont icon-fanhui"></i>
        </div>
        <div>
          <i class="iconfont icon-zhuye"></i>
        </div>
      </div>

      <div class="header-bar" v-show="!isShow" :style="styleOption">
        <div @click="goBack">
          <i class="iconfont icon-fanhui"></i>
        </div>
        <div>
          <span>商品详情</span>
          <span>商品评价</span>
        </div>
        <div>
          <i class="iconfont icon-zhuye"></i>
        </div>
      </div>
    </header>

    <!-- 身体 -->
    <section ref="wrapper">
      <div>
        <div class="swiper-main">
          <swiper :options="swiperOption">
            <swiper-slide v-for="(item, index) in swiperList" :key="index">
              <img :src="item.imgUrl" alt="" />
            </swiper-slide>
          </swiper>
          <div class="swiper-pagination"></div>
        </div>

        <div class="goods-name">
          <h1>{{goods.name}}</h1>
          <div>性价首选，茶感十足、鲜醇耐泡的大众口粮茶</div>
        </div>
        <div class="goods-price">
          <div class="oprice">
            <span>¥</span>
            <b>{{goods.price}}</b>
          </div>
          <div class="pprice">
            <span>价格:</span>
            <del>¥139</del>
          </div>
        </div>
        <div>
          <img
            style="width: 100%; height: 500px"
            :src="goods.imgUrl"
          />
          <img
            style="width: 100%; height: 500px"
            :src="goods.imgUrl"
          />
        </div>
      </div>
    </section>

    <footer>
      <div class="add-cart" @click="addCart">加入购物车</div>
      <div>立即购买</div>
    </footer>
  </div>
</template>

<script>
import 'swiper/dist/css/swiper.css'
import { swiper, swiperSlide } from 'vue-awesome-swiper'
import BetterScroll from 'better-scroll'
import http from '@/common/api/request'
import {Toast} from 'mint-ui'

export default {
  data() {
    return {
      id:'',                    //获取当前id
      goods:{},                 //接受请求的数据
      styleOption: {},          //设置渐变
      BetterScroll: '',         //获取当前滑动
      isShow: true,             //判断是否显示顶部
      swiperOption: {//swiper3
        autoplay: 3000,
        speed: 1000,
        pagination: {
          el: '.swiper-pagination',
          type: 'fraction'
        }
      },
      swiperList: [
        {
          imgUrl: './images/goods1.jpg'
        },
        {
          imgUrl: './images/goods2.jpg'
        },
        {
          imgUrl: './images/goods3.jpg'
        }
      ]
    }
  },
  components: {
    swiper,
    swiperSlide
  },
  // keep-alive的生命周期方法
  activated(){
    if(this.id!=this.$route.query.id){
      // console.log(this.id,this.$route.query.id)
      this.getData()
    }
  },
  methods: {
    // 添加购物车
    addCart(){
      let id=this.$route.query.id
      http.$axios({
        url:'/api/addCart',
        method:'POST',
        data:{
          goodsId:id
        },
        headers:{
          token:true
        }
      }).then(res=>{
        Toast('添加购物车成功')
      })
    },

    // 返回上一页
    goBack() {
      this.$router.back()
    },

    // 请求数据
    async getData(){
      this.id=this.$route.query.id
      let res=await http.$axios({
        url:'/api/goods/id',
        params:{
          id:this.id
        }
      })
      this.goods=res
    }
  },
  // created(){
  //   this.getData()
  // },
  mounted() {
    this.BetterScroll = new BetterScroll(this.$refs.wrapper, {
      probeType: 3,
      bounce: false,
      click: true
    })
    this.BetterScroll.on('scroll',(pos)=>{
      let posY=Math.abs(pos.y)
      let opacity=posY / 180
      
      opacity=opacity>1 ? 1 : opacity
      this.styleOption={opacity:opacity}
      
      if(posY>=50){
        this.isShow=false
      }else{
        this.isShow=true
      }
    })
  },
}
</script>

<style scoped lang="scss">
.detail {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}
header {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 999;
  width: 100%;
  height: 1.173333rem;
  .header-returns {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 1.173333rem;
    div {
      margin: 0 0.266666rem;
      width: 0.933333rem;
      line-height: 0.906666rem;
      text-align: center;
      background-color: rgba(0, 0, 0, 0.3);
      border-radius: 50%;
    }
    i {
      font-size: 0.693333rem;
      color: #fff;
    }
  }
  .header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 1.173333rem;
    font-size: 0.426666rem;
    background-color: #ccc;
    span {
      padding: 0 0.266666rem;
    }
    i {
      padding: 0 0.266666rem;
      font-size: 0.586666rem;
    }
  }
}
section {
  flex: 1;
  overflow: hidden;
}

.swiper-main {
  position: relative;
  width: 100%;
  height: 10rem;
  overflow: hidden;
}
.swiper-container {
  width: 100%;
  height: 10rem;
}
.swiper-container img {
  width: 100%;
  height: 10rem;
}
.swiper-pagination {
  bottom: 0.266666rem;
  width: 100%;
  text-align: right;
  color: #ffffff;
  font-size: 0.426666rem;
}
.swiper-pagination-fraction,
.swiper-pagination-custom,
.swiper-container-horizontal > .swiper-pagination-bullets {
  left: -0.533333rem;
}
.goods-name {
  padding: 0.533333rem 0.266666rem;
  border-bottom: 1px solid #cccccc;
  h1 {
    font-size: 0.533333rem;
    font-weight: 500;
  }
  div {
    padding: 0.08rem 0;
    font-size: 0.373333rem;
    color: #999999;
  }
}
.goods-price {
  padding: 0.533333rem 0.266666rem;
  .oprice {
    color: red;
    span {
      font-size: 0.32rem;
    }
  }
  .pprice {
    color: #999999;
    font-size: 0.373333rem;
  }
}
footer {
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1.306666rem;
  border-top: 1px solid #cccccc;
  background-color: #fff;
  div {
    width: 50%;
    line-height: 1.306666rem;
    font-size: 0.426666rem;
    text-align: center;
    color: #fff;
    background-color: red;
    &.add-cart {
      background-color: #ff9500;
    }
  }
}
</style>
